Safety-valve.



No. 850,626. PATENTED APR. 16, 1907.

W. H. GREIGHTON.

SAFETY VALVE. APPLIOATION FILED AUG. a, 190e.

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UNITED STATES PATENT OFFICE.

` WILLIAM I-I. CREIGHTON, OF

NEW EAGLE, N SYLVANI.

sAFEr'Y-VALVE.

Specification of Letters Patent.

Patented. April 16, 1907.

Application med Augusta 190e. 'serai No. 329.779.

vfollowing is a specification, reference being had therein to theaccompanying drawings. This invention relatesV yto certain new anduseful improvements in safety-valves, particula'rly designed forgas-supply pipes.

My'invention has for its object the provision of novel meansforauoilrliatically closin a as-su l i e shoul t e ressure o gags bei:Tdimififslibd) lir entirely shii)t oif. To this end I have devised asafety-valve adapted to prevent persons from being asphyXiated in acompartment where gas is used as a fuel or for illuminating purposes.y

In this connection my improved valve is l0- cated at a .convenient placeupon the gassupply pipe, whereby it can be easily reached and openedshould the same be closed by a reduction in the pressure of gas. It is awellknown fact that persons have been asphyxiated while sleeping by thesupply of gas being cut off and then turned on again and escapingthrough the burner without being ig nited. My invention aims to obviatethis danger by the provision of novel means for automatically closingthe gas-supply-pipe when the gas-supply is shut off.

The detail construction of my improved safety-valve will be hereinaftermore fully described, illustrated, and the main features thereofspecifically pointed out in the appended claims.

Referring to the drawings forming part of this specification,like'numerals of reference designate corresponding parts throughout theseveral views, in which- Figure 1 is a vertical sectional View of myimproved valve, illustrating the valve in a closed position. Fig. 2 is atransverse sectional view thereof. Fig. 3 is a similar view,illustrating the valve in an open position; and Fig. 4 is a perspectiveview of a pivoted locking-disk used in connection with the same.

My improved safety-valve consists of a cylindrical body portion 1, thelower end of the bore 2 thereof being threaded, as at 3, to receive thethreaded end of a gas-supply pipe 4. The valve-body 1 is formed with anangullar projection 5, having a screw-threaded recess 6 formed thereinto receive the end of an inlet-pipe (not shown) that communicates with asuitable burner, either for heating or illuminating purposes. The recess6 communicates with the bore 2 of the valve-body by an outlet-port 7.

The upper end -of the valve body 1 is .closed except for a centralopenin 8, and eX- tending lupwardly from the top of the valvethe upperends of which are provided with openings 10. In the bore 2 of thevalve-body 1 is mounted a valve-head 11, having a vertically-disposedstem 12 which extends upwardly through the opening 8V of the valvebody.To cushion the valve-head 11 within the valve-body, resilient washers orgaskets 14 are placed in eachend of the bore 2 thereof.

Pivotally mounted between the arms 9 is a tween said arms by a pin I16,mountedin the openings 10 of the arms 9. The lockingdisk is providedwith a tooth 17, adapted to limit the movement of said disk, and with aconventional form of handle 18, whereby the disk can be easilymanipulated.

The normal position of my improved valve is illustrated in Fig. 3 of thedrawings, where it will be observed that the valve-head 11 is in anelevated position, permitting gas to pass from the pipe 4 through'port 7into the recess 6 and t econnecting-pipe thereof. The ressure of gasentering the valve-body 1 is adlapted to maintain the valve-head 11 inthe elevated position shown in Fig. 3, and the stem which normallyengages the disk 15 retains said disk in a partially-elevated position.Should the supply of gas be shut oif, the weight of the valve-head 11and the disk 15 causes the valve-head 11 to descend by gravity until itseats upon the lowermost washer'or gasket 14. The valve-head not onlycloses the pipe 4, but closes the port 7, and is prevented from risingby the disk 15 i being interposed between the upper end of the stem 12and the disk s pivotal connection with the arms 9. The tooth 17 of thedisk 15is adapted to impinge against the side of the stem. 12, at theupper end thereof, and corl rectly position the disk 15,whereby one ofits diameters will lie in alinement with the pivotal connection of saiddisk and the upper end of the stem 12. Should the gas-supply be turnedon, it will be impossible for the gas to escape until the disk 15 iselevated to the position shown in Fig. 3 ofthe drawings. It

body are'two diametrically-opposed arms 9, 4

locking-disk 15, said disk being retained be- IOS IIO

is`obvious that the inlet and outlet of my mproved Valve can bereversed, the pipe 4 serving as an outlet-pipe, while the port 7 servesas an inlet-port.

It is thought from the foregoing description, taken in connection withthe drawings, that the operation of my improved safetyvalve will bereadily apparent, lespecially to those skilled in this art. I do notcare to confine myself to the size, proportion, or material used ineonneetion with my improved valve, and I wish it to be understood thatsuch changes in the details of construction as are permissible by theappended elaims may be resorted to without departing from the s irit andscope of the invention.

W at I elaim, and desire to secure by Letters Patent, is-

1. In a safety-valve, the combination With a suitable gas-su ply pipe,of a valvel body connected to sai supply-pipe and havl ing anoutlet-port formed therein, upwardlyextending arms carried by saidvalve-body, a

valve-head slidably mounted in said valve bod a stem carried by saidhead and exten ing upwardly throu h said valve-body between said arms, aloe ing-disk pivotally mounted between said arms and engagin said stem,a tooth carried by said disk an adapted to limit the/movement thereof,substantially as described.

2. In a safety-valve, a yValve-body having an outlet-port,upwardly-extending arms carried by said valve-body, a valve-headslidably mounted in said valve-body, a stem carried bysaid vhead andextending upvwardly throu h said body between said arms,

a locking-dis pivotally mounted between said arms and engaging saidstem, and a tooth on said disk adapted to impinge against the stem andlimit the rotative' movement of the disk in one direction.

In testimony whereof Iaix, my signature inthe presence of two witnesses.

WILLIAM H. CREIGHTON. Witnesses:

MAX H. SnoLovrrz, A. J. TRIGG.

